src/m4af_endian.h

   1 /*
   2  * Copyright (C) 2013 nu774
   3  * For conditions of distribution and use, see copyright notice in COPYING
   4  */
   5 #ifndef M4AF_ENDIAN_H
   6 #define M4AF_ENDIAN_H
   7
   8 #if HAVE_CONFIG_H
   9 #  include "config.h"
  10 #endif
  11 #if HAVE_STDINT_H
  12 #  include <stdint.h>
  13 #endif
  14
  15 #if HAVE_ENDIAN_H
  16 #  include <endian.h>
  17 #  define m4af_htob16(x) htobe16(x)
  18 #  define m4af_htob32(x) htobe32(x)
  19 #  define m4af_htob64(x) htobe64(x)
  20 #  define m4af_btoh16(x) be16toh(x)
  21 #  define m4af_btoh32(x) be32toh(x)
  22 #  define m4af_btoh64(x) be64toh(x)
  23 #  define m4af_htol16(x) htole16(x)
  24 #  define m4af_htol32(x) htole32(x)
  25 #  define m4af_htol64(x) htole64(x)
  26 #  define m4af_ltoh16(x) le16toh(x)
  27 #  define m4af_ltoh32(x) le32toh(x)
  28 #  define m4af_ltoh64(x) le64toh(x)
  29 #elif WORDS_BIGENDIAN
  30 #  define m4af_htob16(x) (x)
  31 #  define m4af_htob32(x) (x)
  32 #  define m4af_htob64(x) (x)
  33 #  define m4af_btoh16(x) (x)
  34 #  define m4af_btoh32(x) (x)
  35 #  define m4af_btoh64(x) (x)
  36 #  define m4af_ltoh16(x) m4af_swap16(x)
  37 #  define m4af_ltoh32(x) m4af_swap32(x)
  38 #  define m4af_ltoh64(x) m4af_swap64(x)
  39 #  define m4af_htol16(x) m4af_swap16(x)
  40 #  define m4af_htol32(x) m4af_swap32(x)
  41 #  define m4af_htol64(x) m4af_swap64(x)
  42 #else
  43 #  define m4af_htob16(x) m4af_swap16(x)
  44 #  define m4af_htob32(x) m4af_swap32(x)
  45 #  define m4af_htob64(x) m4af_swap64(x)
  46 #  define m4af_btoh16(x) m4af_swap16(x)
  47 #  define m4af_btoh32(x) m4af_swap32(x)
  48 #  define m4af_btoh64(x) m4af_swap64(x)
  49 #  define m4af_ltoh16(x) (x)
  50 #  define m4af_ltoh32(x) (x)
  51 #  define m4af_ltoh64(x) (x)
  52 #  define m4af_htol16(x) (x)
  53 #  define m4af_htol32(x) (x)
  54 #  define m4af_htol64(x) (x)
  55 #endif
  56
  57 #if _MSC_VER >= 1400
  58 #  include <stdlib.h>
  59 #  define m4af_swap16(x) _byteswap_ushort(x)
  60 #  define m4af_swap32(x) _byteswap_ulong(x)
  61 #  define m4af_swap64(x) _byteswap_uint64(x)
  62 #elif HAVE_BYTESWAP_H
  63 #  include <byteswap.h>
  64 #  define m4af_swap16(x) bswap_16(x)
  65 #  define m4af_swap32(x) bswap_32(x)
  66 #  define m4af_swap64(x) bswap_64(x)
  67 #else
  68 static inline uint16_t m4af_swap16(uint16_t x)
  69 {
  70     return (x >> 8) | (x << 8);
  71 }
  72
  73 static inline uint32_t m4af_swap32(uint32_t x)
  74 {
  75     return (m4af_htob16(x) << 16) | m4af_htob16(x >> 16);
  76 }
  77
  78 static inline uint64_t m4af_swap64(uint64_t x)
  79 {
  80     return ((uint64_t)m4af_htob32(x) << 32) | m4af_htob32(x >> 32);
  81 }
  82 #endif
  83
  84 #endif /* M4AF_ENDIAN_H */
  85